/* Gauge - Performance Measurement Framework for Mobile Platforms
 * Copyright (C) 2013, Juha Hytonen <juha.a.hytonen@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.gauge.GaugeAgent;

import org.gauge.Workload;

/**
 * Runs a workload for the given number of milliseconds.
 * 
 * @see Workload
 */
public final class TimedWorkloadRunner extends AbstractWorkloadRunner {
	
	private TimedStopper stopper;
	
	public TimedWorkloadRunner(Workload workload, int millisecsToRun) {
		super(workload);
		this.stopper = new TimedStopper(this, millisecsToRun);
	}
	
	public void Start() {
		super.Start();
		stopper.Start();
	}
	
	public void Stop() throws Exception {
		super.Stop();
		stopper = null;
	}

	/**
	 * Auxiliary class for TimedWorkloadRunner. Issues a stop after
	 * given time.
	 */
	private final class TimedStopper implements Runnable {
		
		private TimedWorkloadRunner workloadRunner;
		private Thread stopperThread;
		private int stopAfterMillisecs;
		
		public TimedStopper(TimedWorkloadRunner workloadRunner, int stopAfterMillisecs) {
			this.workloadRunner = workloadRunner;
			this.stopAfterMillisecs = stopAfterMillisecs;
			this.stopperThread = new Thread(this);
		}
		
		public void Start() {
			stopperThread.start();
		}
		
		@Override
		public void run() {
			try {
				Thread.sleep(stopAfterMillisecs);
				workloadRunner.Stop();
			}
			catch(InterruptedException e) {
			}
			catch(Exception e) {
			}
		}
		
	}

}
